#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:Taotie Ren

user = 'taotieren'
passwd = 'taotieren'

username = input("username:")
password = input("password:")

if user == username:
    print ("username is correct...")
    if passwd == password:
        print("Welcome login ")
    else:
        print("password is invalid ")
else:
    print("连用户名都没蒙对")